More basic info: As stated before, the raw Rifle FCM 6.0 (circa 1909) weighed 127 grams. And it had a mid-high bend point (which promotes slightly lower than average launch angle), and a firm tip.
For Nippon shafts, you face a variety of models with names which all sound like complex chemical molecules. Overall, the NS family shafts play a little soft to flex; one problem is that the NS models don't appear in the FCM comparison tables, so I don't have any FCM figures for NS. Models you might check out:
- NS Modus3 Tour 120: X Flex, 120 gram, mid-high bendpoint, stiff tip.
- NS Pro 1150GH Tour: S Flex, 116 grams, mid bend, medium tip.
You would need some launch monitor time to see how they worked for you; they might be too soft. The 1150 would need a hard step for your to consider it.... even then it's iffy.
For KBS shafts, several possibilities, but you'd have to check out on the launch monitor. For one thing, the KBS Stiff is about the same FCM as Rifle Stiff. With KBS models, you'll find weight variations between the same flex, depending on whether it's parallel or taper tip.
In your case, check out the KBS Tour C-Taper, Tour Custom White, and Tour in S and X flex. Check out the spec sheets, the data points vary a lot.
One challenge: by wanting stiffer and lighter, you're trying to go north and south at the same time. To get both, you may need some hardstepping.
In the future, let us know if the MP33 iron model is tape or parallel tip - tip style can mean different weights within a shaft model. I couldn't find any data on MP33.